C1042 Right Front Tone Wheel Performance

C1042 Right Front Tone Wheel Performance - When the Antilock Brake System (ABS) Module detects periodic drops of a wheel speed sensor (WSS) signal.

C1042 Right Front Tone Wheel Performance

Possible causes C1042 code

  • Dirty tone wheel/sensor.
  • Improper right front tire pressure/mismatched tires.
  • Right front tone wheel/bearing damage.

Diagnose DTC C1042 Right Front Tone Wheel Performance

Step 1. Check for a DTC
This DTC must be active for the result of this test to be valid.
Turn the igntion on, with the scan tool, read DTC. Record and freeze frame information. With the scan tool, erase DTC. Cycle the ignition switch off then on.

Caution: Make sure braking capability is available before road testing.

Test drive the vehicle in a straight line to 40 km/h (25mph). Vehicle must be driven above 40 Km/h (25 mph) for set conditions to be met.
With the scan tool, read DTC.

Does the scan tool display C1042 RIGHT FRONT TONE WHEEL PERFORMANCE?

YES, go to step 3.
NO, go to step 2.

Step 2. Check wheel speed sensor signals
Turn the ignition on, with the scan tool, monitor and graph All the WSS speeds and compare graph while an assistant drives the vehicle. If graph shows periodic dropouts pay close attention to the tone wheel. Slowly accelerate as staright as possible from a stop to 40 km/h (25 mph).

Is the Right Front WSS speed showing 0 km/h (0 mph) or not matching other wheels or showing erratic behavior?

YES, go to step 3
NO, Perform the ABS Verification Test.

Step 3. Check for improper right front tire pressure/mismatched tires
Turn the ignition off, check and adjust the right front tire pressure. Check and adjust all other tire pressures, inspect for mismatched tires on vehicle.

Is the right front improperly inflated or mismatched tires on vehicle?

YES, repair as necessary.
NO, go to step 4.

Step 4. Check the right front tone wheel/bearing for damage
Check the tone wheel teeth for missing teeth, cracks, or looseness. Teeth should be perfectly square, not bent, or nicked.
Check the right front tone wheel/bearing for damage, check the right front tone wheel for dirt.

Was the tone wheel dirty?

YES, clean tone wheel and sensor. Clear codes and retest.
NO, replace the right front tone wheel/bearing.

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